This paper not only gives the definition of Hausdorff dimension, also obtains spectral dimension . Then analysis a general function based on strict decreasing rules and defined dimension spectrum. At last, the applica...
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This paper not only gives the definition of Hausdorff dimension, also obtains spectral dimension . Then analysis a general function based on strict decreasing rules and defined dimension spectrum. At last, the application provides that this spectral has the same result as one-dimensional of cantor.
The analysis and study on MIMO channels capacity is benifit to 4G network's construction and optimization in the future. On the condition of invariable coefficient of channels, MIMO channel capacity and its approx...
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ISBN:
(纸本)9787121113154
The analysis and study on MIMO channels capacity is benifit to 4G network's construction and optimization in the future. On the condition of invariable coefficient of channels, MIMO channel capacity and its approximate expression in low SNR was deduced when equal transmit energy scheme was adopted. When waterfilling power algorithm was applied capacacity was also given in detail with CSI at the transmitter. The above two power allocation schemes were compared in the same enviroment by simulation: In the instance of power not being added, waterfilling algorithm is optimal but it is too complex on the operation;If the channel was Rayleigh i.i.d approximatively MIMO channel limit capacity expression was deduced. The tendency of change on ergodic capacity and outage capacity was simulated in various antenna configurations: ergodic capacity and outage capacity improved with rising number of transmit antennas and receive antennas.
Waveguides are structures consisting of geometrically identical subdomains, usually called periodic cells which have many practical applications, for example, optical communications, filters, lasers, and microwaves. F...
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Waveguides are structures consisting of geometrically identical subdomains, usually called periodic cells which have many practical applications, for example, optical communications, filters, lasers, and microwaves. Finite element based approaches for infinite periodic structures have one fundamental restriction. The finite element mesh on opposite sides of the cell must be exactly the same, i.e., a periodic mesh. In this paper, we consider a novel finite element meshing method for calculation of waveguide band structures. In particular, we propose a simple mapping scheme to generate periodic mesh. We first map the periodic cell to a closed domain such that the periodic cell are glued together in the new domain. Then we can apply mesh generation schemes to obtain a regular triangular mesh. This mesh is mapped back to the periodic cell such that the nodes and edges on the periodic boundaries are matched.
Using the package of Rmxprt in MAXWELL 2D, this paper optimal design the efficiency and torque in terms of the choice of core material, stator winding, stator and rotor slots, sub-phase capacitor, etc. based on two si...
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ISBN:
(纸本)9788986510119
Using the package of Rmxprt in MAXWELL 2D, this paper optimal design the efficiency and torque in terms of the choice of core material, stator winding, stator and rotor slots, sub-phase capacitor, etc. based on two single-phase induction motors.
Using the multi-objective hybrid simulated annealing algorithm, this paper optimal design the three-phase induction motor. Typical examples of optimization show the efficiency and feasibility of this method.
ISBN:
(纸本)9788986510119
Using the multi-objective hybrid simulated annealing algorithm, this paper optimal design the three-phase induction motor. Typical examples of optimization show the efficiency and feasibility of this method.
The optimal damping control for nonlinear time-delay systems with persistent disturbances is considered. Based on successive approximation approach (SAA), the optimal damping control (ODC) law is achieved by solving a...
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In this paper, we develop a rescue robot that searches for the victim in the disaster scene. To go into a narrow space in such a scene, size of the robot should be small. But the ability to pass over the trench and th...
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ISBN:
(纸本)9780889868595
In this paper, we develop a rescue robot that searches for the victim in the disaster scene. To go into a narrow space in such a scene, size of the robot should be small. But the ability to pass over the trench and the rubble is important. We propose the crawler type robot which has the expandable side crawler. This mechanism can enlarge the mobility of the robot by expanding the side crawler when it is necessary. And this rescue robot pass the rubble by using the side crawler as the arm. So that the swing mechanism for the side crawler is also installed. Details of the developed robot and several experiments are denoted in this paper.
In this paper, a new chaotic system is proposed. It also belongs to Lorenz system, which has three parameters and two nonlinear terms, and one of the parameters is the bifurcation parameter. The nonlinear dynamic prop...
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ISBN:
(纸本)9781424460434
In this paper, a new chaotic system is proposed. It also belongs to Lorenz system, which has three parameters and two nonlinear terms, and one of the parameters is the bifurcation parameter. The nonlinear dynamic properties of the system such as strange attractor, the largest Lyapunov index, fractal dimension, spectrum, power spectrum and bifurcation are researched via theoretical analysis and digital simulation. EWB software is used to design and simulate the circuit. The numerical and circuit simulation indicates the new nonlinear system proposed can show chaotic characteristics.
In this paper, the model of the weighted NW small-world networks is established when the topology of the network is given. Then the sufficient condition for synchronization in weighted networks is obtained by stabilit...
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ISBN:
(纸本)9781424460434
In this paper, the model of the weighted NW small-world networks is established when the topology of the network is given. Then the sufficient condition for synchronization in weighted networks is obtained by stability theory and matrix theory under the conditions of the weight is fixed. Moreover, the H-R neurons network is used to verify its feasibility via numerical simulation. Finally, the smallest coupled strength is obtained when connection probability is existent.
The optimal control for CooPerative control of multi-motor drive system is considered. A multi-motor drive model with disturbances is presented. Firstly, the Mathematical model of the cooPerative control of multi-moto...
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ISBN:
(纸本)9781424463886;9780769539874
The optimal control for CooPerative control of multi-motor drive system is considered. A multi-motor drive model with disturbances is presented. Firstly, the Mathematical model of the cooPerative control of multi-motor drive system is formulated. Then, the finite horizontal feedforward and feedback optimal active control law are designed by introducing a disturbance compensation term, which can be obtained by solving matrix Riccati equation and special matrix equation. The control design method is easy to implement.
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